Plan d’maintenance Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box
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📖Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box: the uncompromising heavy-duty hauler

Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box (2007-2010)

With its full four-door crew cabin and an eight-foot load bed, the GMT900-generation Silverado 2500 HD from 2007 to 2010 was engineered for pulling substantial plant trailers, fifth-wheel caravans, and horseboxes rather than leisure cruising. As one of the most capable platforms in Chevrolet's heavy-duty truck portfolio, it offered immense pulling power while retaining single-rear-wheel road tax advantages. Rigorous and preventative Chevrolet Silverado 2500 HD maintenance is indispensable to ensure this immense working chassis delivers dependable service over hundreds of thousands of kilometres.

Under the bonnet, buyers chose between two distinct mechanical philosophies. The naturally aspirated 6.0-litre Vortec LY6 petrol V8 provides robust, straightforward performance for modest annual mileages, avoiding modern diesel emissions complexity. Conversely, the Duramax V8 turbo-diesel LMM paired with the heavy-duty Allison automatic transmission delivers relentless towing torque for commercial haulage. On this extended wheelbase configuration, motorway tracking stability is exceptional, although sustained payload strains front suspension wishbones, steering idler arms, and the long prop-shaft universal joints.

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Owner notes

The reassuring points, known weak spots and deadlines you should not let slip.

Reassuring points

Reliability
  • The 6.0-litre LY6 petrol V8 offers straightforward mechanical simplicity without modern diesel exhaust aftertreatment overheads.
  • The 6.6-litre Duramax LMM and Allison 1000 combination provides immense towing stamina and motorway composure under heavy loads.
  • The Crew Cab Long Box layout delivers maximum passenger accommodation alongside an uncompromised eight-foot cargo bed.

Chronic weak spots

Keep an eye on
  • 6.6-litre Duramax LMM: check DPF regeneration frequency, CLEAN EXHAUST FILTER warnings, EGR valve soot build-up, and avoid short-journey carbon fouling.
  • Duramax LMM 2007-2010: inspect exhaust gas temperature sensors for seizing or fault codes that disrupt automated particulate filter cleaning cycles.
  • Allison 1000 gearbox: verify seamless 2-3 and 3-4 gear shifts under load, inspect fluid colour, and check for breather vent weeping in freezing weather.
  • Heavy-duty steering linkage: examine the steering gearbox, pitman and idler arms, and prop-shaft universal joints for slack or vibration at 80 to 110 km/h.
  • Chassis and load bed: inspect rear multi-leaf springs, fifth-wheel mounting plates, and frame crossmembers for rust or structural overloading fatigue.

Critical deadlines

Do not miss
  • On Duramax LMM models, address DPF regeneration warnings or faulty exhaust temperature sensors immediately to prevent severe exhaust backpressure and limp mode.
  • An Allison 1000 gearbox exhibiting breather fluid leaks, high fluid temperatures, or slipping shifts must be serviced promptly to save the torque converter.
  • On trucks used for regular towing, changing gearbox, transfer case, and differential lubricants on schedule is essential for mechanical survival.
  • Excessive steering play, sagging rear leaf springs, or distorted towing receiver hitches must be rectified before towing heavy trailers.

Fréquences d'maintenance recommandées

Service markers for petrol/diesel versions. Exact intervals vary by engine and model year.

Oil change

Every 15 000 km

Every 1 year

Service

Every 15 000 km

Every 1 year

Brake pads

Every 30 000 km

Every 2 years

Poids ou puissance élevés : usure des number platettes accélérée sur certaines versions

Timing belt / chain

Every 100 000 km

Every 5 years

Battery (12 V)

Every 50 000 km

Every 4 years

Powertrains and average consumption

Average consumption from manufacturer data for the versions available in this generation.

Petrol and diesel powertrains

Petrol, diesel or LPG versions. The intervals shown cover the usual mechanical jobs.

Estimated average budget

Mid-range cost

Servicing a Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box sits slightly above the market average (+21%).

Simple oil change~125
Full service~355
Front brake pads~170
Timing-belt kit~650
Tyres (set of 4)~450

* Indicative estimates for parts and labour.

Frequently asked questions about Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box

What are the common problems on the Silverado 2500 HD II (GMT900) Crew Cab Long Box?
Silverado 2500 HD II (GMT900) Crew Cab Long Box owners should especially watch: 6.6-litre Duramax LMM: check DPF regeneration frequency, CLEAN EXHAUST FILTER warnings, EGR valve soot build-up, and avoid short-journey carbon fouling. Duramax LMM 2007-2010: inspect exhaust gas temperature sensors for seizing or fault codes that disrupt automated particulate filter cleaning cycles. Garajo includes these watch points so you can act early.
When should you change the timing belt on a Silverado 2500 HD II (GMT900) Crew Cab Long Box?
The timing belt is usually replaced every 100,000 km or 5 years on this type of engine.
Where can I find the service book for the Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box?
Garajo offers a free digital service book, always up to date, with reminders and a detailed history for your Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box.
How much does it cost to service a Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box?
The service budget for a Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box sits slightly above the market average (+21%). Allow about 355 € for a full service, for example. Garajo estimates your budget by powertrain and tracks what you actually spend, for free.
Which Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box powertrain is best for town use?
This model is only available as petrol/diesel. Fuel mix: 2 petrol versions ; 2 diesel versions. In town, petrol/LPG versions are usually the better match; diesel versions make more sense with regular long journeys.
Which Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box powertrain should you choose if you mostly drive on the motorway?
This model is only available as petrol/diesel. Fuel mix: 2 petrol versions ; 2 diesel versions. For regular motorway use, diesel versions of this model are usually the best fit (range and refinement at a steady speed).

Compatible engine oil

Which engine oil for Chevrolet Silverado 2500 HD II (GMT900) Crew Cab Long Box?

These links are limited to the engines of this generation when oil data is available.

Unsure between two viscosities?5W-30 vs 0W-300W-20 vs 0W-305W-30 vs 5W-40

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